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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY
Journal Basic Information
Journal DOI :
Korean Academy of Pediatric Dentistry
Editor in Chief :
Volume & Issues
Volume 33, Issue 4 - Nov 2006
Volume 33, Issue 3 - Aug 2006
Volume 33, Issue 2 - May 2006
Volume 33, Issue 1 - Feb 2006
Selecting the target year
The effects of blocking the oxygen in the air during the polymerization of sealant
Oh, You-Hyang ; Lee, Nan-Young ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 365~376
The purpose of this study was to evaluate the efficacy of blocking the oxygen in the air during the polymerization of sealant. All curing were performed with various light curing units under the application of oxygen gel barrier, stream of nitrogen and carbon dioxide gas for inhibition of oxygen diffusion into sealant surface. The results of present study can be summarized as follows : 1. The amount of eluted TEGDMA form the specimens cured with all the three different light units in the stream of
gas and application of Oxygen gel barrier(
) were significantly lower than in the room-air atmosphere (Control) (p<0.05). 2. In the
application, the amount of eluted TEGDMA the specimen cured with PAC light for 10seconds was less than that cured in the stream of
atmospheric conditions (p<0.05) 3. In the LED using 10 or 20sec irradiation times under the stream of
, the eluted TEGDMA showed to be no statistically significant difference (p>0.05). 4. The microhardness from the specimens cured with all the three different light units under each treated conditions were significantly higher than in the room-air atmosphere (p<0.05). 5. The surface treatment by
reduces the thickness of oxygen inhibited layer by sp proximately 49% of the untreated control value.
INFLUENCE OF MULTIPLE ADHESIVE COATINGS ON THE SHEAR BONDING STRENGTH OF COMPOSITE RESIN
Park, Heon-Dong ; Lee, Chang-Seop ; Lee, Sang-Ho ; Lee, Nan-Young ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 377~387
The objective of this study was to evaluate the influence of multiple adhesive coatings on the thickness of hybrid and adhesive layer and shear bond strength(SBS) of self-etch adhesives and self-etch primer adhesives. The buccal or lingual crown dentin of extracted human molars was used. Self-etch adhesives or self-etch primer adhesives were applied 1, 2 and 3 times on the dentin before light curing. In another group adhesives were reapplied after light curing first layer. Treated surfaces were prepared to measure the thickness of hybrid and adhesive layer with SEM, and shear bond strength to dentin using an Instron machine. The following results were obtained : 1. The adhesive layers increased with the number of coatings(p<0.05) with all adhesives. Adpor Prompt L-Pop and Xeno III were significantly thinner than self-etch primer adhesives (p<0.05). 2. The thickness of hybrid layers increased with the number of coatings (p<0.05). 3. The shear bonding strength of Unifil Bond and Clearfill SE Bond were higher than Scotchbond Multipurpose Plus and Adpor Prompt L-Pop (p<0.05), and similar with Xeno III. 4. The shear bond strength increased significantly with the number of coatings in Adpor Prompt L-Pop(p<0.05), but decreased at 3 times in AdheSE Bond(p>0.05). 5. In Adpor Prompt L-Pop and Xeno III, the shear bond strength decreased when adhesives were reapplied after curing the first adhesive layer.
A STUDY ON THE INFECTION LEVEL OF S. MUTANS AND LACTOBACILLUS AND ITS RELATIVITY WITH CARIES RISK FACTORS IN 18 MONTH-OLD INFANTS
Ahn, Jin-Gong ; Chung, Jin ; Jeong, Tae-Sung ; Kim, Shin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 388~400
The time 18 months after birth is very important for the prevention of early childhood caries because this time is proper to assure the completion of weaning and to perform the diet counseling, and caries process is initiated or actively aggravated under the total influence of feeding pattern from this period. For the purpose of examining the infection status of Streptococcus mutans and Lactobacillus of 18 month old infants and their mothers, and analyzing the correlation between infection status versus various caries-risk factors, this study was performed on the 60 infants of 18 months old and their mothers through the microbiological screening of saliva samples and direct questionnaire to mothers about the caries risk factors. And the results were as follows, 1. The higher the mother's infection level of S. muntans, the higher the infant's infection level and transmission rate. 2. Compared with non-caries group, higher infection level of S. mutans in both infants and mothers and transmission rate were revealed in caries group. 3. The higher the infant's infection level of S. mutans, the higher the caries prevalence and deft values, the less the monthly income of the parents, the longer the period of breast feeding, and the higher the consumption rate of sugared snacks. 4. Most of Lactobacillus infected infants were revealed to be infected also with S. mutans and to have caries. 5. The higher deft value, less parents' monthly income, more frequent daily nursing and more irregular snacking patterns were found among Lactobacillus infected group compared with not-infected group.
Generation of antibodies against N-terminus fragment of AgI/II protein from Streptococcus mutans GS-5
Han, Ji-Hye ; Baik, Byeong-Ju ; Yang, Yeon-Mi ; Park, Jeong-Yeol ; Kim, Jae-Gon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 401~410
Dental caries results from localized demineralization of tooth enamel by acids of bacterial origin produced from the fermentation of dietary sugars. A group of related oral bacteria, collectively known as mutans streptococci, are implicated as the primary etiological agents of human caries. Within this group, Streptococcus mutans has been known as a causative agent for dental caries. As well as acid production yielding the demineralization of tooth enamel, adherence and colonization of S. mutans to the teeth are also important for their virulence Cell-surface fibrillar proteins, which mediate adherence to the salivary pellicle are virulence components of mutans streptococci, and primary candidates for a human caries vaccine. Here we report that the AgI/II gene from S. mutans GS-5 were cloned by PCR amplification of the bacterial chromosomal DNA and the integrity of cloned genes were confirmed by nucleotide sequencing. Sequence analyses showed the sequence alignment of 280 nucleotides between the cloned AgI/II and the reported sequence of S. mutans GS-5 showed the perfect match The cloned genes which signal nucleotide was truncated, were transferred into bacterial expression vector and the recombinant proteins were purified as His-tag fusion proteins In order to generate polyclonal antibodies against the recombinant proteins, AgI/II mr, some
of the proteins was injected into mice three times. It can be used for an effective vaccine production to prevent dental caries caused by pathogenic S. mutans.
EVALUATION OF GINGIVAL CONDITION ON CHILDREN USING PERIOTRON
Shin, Jeong-Geun ; Kim, Jae-Gon ; Yang, Yeon-Mi ; Kim, Sung-Hee ; Baik, Byeong-Ju ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 411~421
In children, during developing occlusion stage, many studies confirm a high prevalence of gingival inflammation. Prevention, early diagnosis and treatment of gingival and periodontal disease is important because by establishing excellent oral hygiene habits in children, the risk of periodontal disease can be on the decrease in adulthood. This study evaluated the gingival conditions of 50 children
receiving clinical examination and GCF test at the pediatric dentistry of Chonbuk national university hospital in Jeonju, Korea. I estimated children's and adult's gingival states by measuring gingival crevicular fluid(GCF) using Periopaper and
8000, gingival index, plaque index, DMFT scale. The results were as follows : 1. There are no statistical differences of GCF volume among the groups of the primary dentition, tooth erupting stage, complete eruption stage(p>0.1). But mean value of GCF is highest at the tooth erupting stage. 2. Comparing with adults, children have higher mean value of GCF volume with statistical differences (p<0.001). 3. There is statistically positive relationship between volume of GCF and gingival index (GI), plaque index(PLI) in both adults and children(GI; r=0.394, PLI ; r= 0.642). 4. There is no relationship between GCF volume and dental caries, composite resin treatments (p>0.05). But There is statistically positive relationship between GCF and orthodontic treatments(p<0.001) 5. Primary dentition has higher mean value of DMFT than permanent dentition(p<0.001). But there is no statistical relationship between GCF and DMFT (p>0.1).
MICROLEAKAGE OF 7TH GENERATION BONDING SYSTEM
Lee, Sang-Yup ; Kim, Dae-Eup ; Ra, Ji-Young ; Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 422~428
Dentin bonding system have recently been developed in an effort to simplify and shorten bonding procedure. The intent of this study was to evaluate microleakage of newer generation of dentin bonding system comparing with other generations. Forty extracted human premolar teeth were randomly assigned to four groups for bonding : the 4th generation bonding system (Scotchbond Multi-Purpose). the 5th generation bonding system (Clearfil SE Bond), 6th generation bonding system (AQ bond) and 7th generation bonding
Class V cavities were prepared in buccal and lingual surface. The cavities were restored with composite resin (Z100) after the application of dentin bonding systems according to the instructions of the manufacturer Samples were thermocycled and immersed in methylene blue dye(2%). Each sample was sectioned with Isomet and evaluated for microleakage using stereomicroscopy. The mean value of the microleakage in 7th generation bonding system was greater than those of 4, 5, 6th generation dentin bonding system. Statistically, the mean values of microleakage between 4th and 7th generation bonding system were significantly different from each other (p<0.05).
STUDY ON THE COLORS OF PRIMARY INCISORS USING DIGITAL SHADE ANALYSING SYSTEM
Oh, Min-Hyung ; Lee, Kwang-Hee ; Ra, Ji-Young ; Kim, Dae-Eop ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 429~437
The purpose of this study was to evaluate the shade of primary incisors. One hundred and nineteen children 394 maxillary anterior primary incisors were assessed. Digital shade analysing system (
, Cynovad, Canada) was used for measuring the shades This system enabled to improve the accuracy and objectivity The images of the teeth were taken with
and shade maps of the teeth were obtained with
software. The shades of three regions (cervical third middle third, incisal third) of the teeth were evaluated. The results were as follows : 1. In cervical third of primary incisors, D2 and D3 were the major shades and D2 was the most frequent shade. 2. In middle third of primary incisors, C1, D2, and B1 were the major shades and C1 was the most frequent shade. 3. In incisal third of primary incisors, A2 was the most frequent shade and D2 shade followed.
MARGINAL LEAKAGE OF COMPOSITE RESIN AND COMPOMER RESTORATIONS CURED WITH THREE DIFFERENT LIGHT SOURCES
Park, Chang-Hoo ; Yang, Kyu-Ho ; Kim, Seon-Mi ; Choi, Nam-Ki ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 438~446
The purpose of this study was to evaluate the microleakage of composite resin(
) and compomer(Dyract AP) cured with various curing lights(Elipar
, and Elipar FreeLight
). Box-shaped class V cavities were prepared on the buccal and lingual surfaces of extracted human third molars. The sectioned specimens were evaluated for dye penetration and following results were obtained. 1. Regarding microleakage in the enamel margin with different curing light sources, there was no significant difference in Dyract AP whereas
showed higher microleakage score than those of FreeLight
(p<0.05). 2. Regarding microleakage in the dentin margin with curing light sources, there were no significant differences in both Dyract AP and
(p>0.05). 3. Regarding microleakage in the enamel margin with filling materials. there were no significant differences in both filling materials with
showed less microleakage than Dyract AP with FreeLight
(p<0.05). 4. Regarding microleakage in the dentin margin with filling materials, there wer no significant differences in both filling materials with
showed less microleakage than Dyract AP with FreeLight
(p<0.05). 5. Enamel margin showed less microleakage than dentin margin when filled with Dyract AP and cured with
(p<0.05), but there were no statistically significant differences between the enamel and the dentin in the rest groups. This study suggested that
showed lower microleakage score than Dyract AP. and that
showed higher microleakage score than FreeLight
in the enamel margin filled with
THE ANTIMICROBIAL EFFECT OF HORSERADISH(ARMORACIA RUSTICANA) ROOT EXTRACTS AGAINST ORAL PATHOGENS
Yu, Nan-Young ; Lee, Ju-Hyun ; Seo, Hyun-Woo ; Park, Ho-Won ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 447~456
In this study, the antimicrobial effects of Horseradish (Armoracia rusticana) root extracts against oral pathogens were investigated, and also compared with that of chlorhexidine. The following 7 microorganisms were used in this study, Streptococcus mutans ATCC 25175, Streptococcus sobrinus(d) ATCC 27607, Lactobacillus casei ATCC 393, Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212, Actinobacillus actinomycetemcomitans ATCC 29522. Candida albicans ATCC 10261. Horseradish root extracts and chlorhexidine were tested to determine their minimum inhibitory concentration(MIC) and minimum bactericidal concentration(MBC). The results of this study can be summarized as follows : 1. Horseradish root extracts showed antimicrobial effect against the tested oral pathogens. MIC and MBC of this extracts were 30-125, 125-500ppm, respectively. Especially, it was the most effective against C. albicans of other tested microorganisms. 2. Chlorhexidine also showed antimicrobial effect against the tested oral pathogens. MIC of chlorhexidine range between 0.15 and 2.5%, MBC are 0.4-2.5%. In conclusion, it was suggested that AIT had similar antimicrobial effects in the lower concentration, compared with that of chlorhexidine.
PERIODONTOPATHIC BACTERIA IN SUBGINGIVAL PLAQUE OF NORMAL AND HANDICAPPED PERSON
Lee, Hae-Song ; Kim, Seon-MI ; Choi, Nam-Ki ; Oh, Jong-Suk ; Kang, Mi-Sun ; Lim, Hoi-Jeong ; Yang, Kyu-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 457~468
It is widely known that individuals with mental retardation (MR) and Down's syndrome (DS) often develop early onset periodontal diseases. In this study, the prevalence of periodontopathic bacteria in MR persons and DS patients was compared with normal persons. Plaque index and gingival index were measured. Five periodontopathic bacteria, Actinobacillus actinomycetemcomitans. Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Fusobacterium nucleatum were surveyed in subgingival plaque samples by the polymerase chain reaction. Results : 1. Plaque index and gingival index were higher in MR persons group and DS patients group than normal persons group (p<0.05). 2. The prevalence of periodontopathic bacteria in normal persons group were lower than that of MR persons group and DS. Significant differences were observed in the prevalence of P. gingivalis, T. denticola and A. actinomycetemcomitans(P<0.05). 3. Prevalence of P. gingivalis(5.9%) at age 8-10 was lower than other ages in normal persons group, and its prevalence increased with age Prevalence of P. gingivalis, T. denticola and A. actinomycetemcomitans at MR persons group and DS patients group were higher than those of same ages of normal persons group. 4. Plaque index was associated with T. denticola and gingival index was associated with T. denticola and A. actinomycetemcomitans(P<0.05). These results suggested that plaque index, gingival index and prevalence of periodontopathic pathogens, especially P. gingivalis, T. denticola and A actinomycetemcomitans in DS patients group and MR persons group are higher than those of normal persons group.
The effect of acidic drinks on the surface of tooth-colored restorative materials
Bang, Seok-Yun ; Kim, Eun-Jung ; Kim, Hyun-Jung ; Nam, Soon-Hyeun ; Kim, Young-Jin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 469~481
Among the etiologic factors of enamel corrosion, daily intake has been considered with a profound interest, especially the intake of acidic drinks. It is thought that the rapid consumption of acidic drinks will not only results in the affection to the teeth but also to the surface of the tooth-colored restorative materials. Therefore, the puopose of this study is to examine the alterations occurred in the surface of the tooth-colored materials according to the exposed time, with 3 most common acidic drinks in contact with daily life. Resin-modified glass-ionomer, polyacid-modified composite resin, composite resin were immersed on 0.9% NaCl, Coke, orange juice, sports beverages as 4 groups in each. The surface hardness and the surface roughness of specimens were measured with following methods: before immersion, 1 day after immersion, 1-,2-,3-,4- weeks after immersion. Results were as follows. 1. Tooth-colored restorative materials, with the exception of composite resin, showed statistically significant changes in surface hardness and roughness when immersed on acidic drinks(p<0.05). 2. The degree of change in surface hardness and roughness occurred as follows, in order of severity from greatest to least resin-modified glass-ionomer, polyacid-modified composite resin, composite resin 3. Sports beverages resulted in greater alterations to surfaces than Coke and orange juice. 4. In the SEM image of the groups immersed in acidic drinks, resin-modified glass-ionomer and polyacid-modified composite resin showed loss of filer. Severe cracks were observed, especially on the resin-modified glass-ionomer.
AN INVESTIGATION OF THE FREQUENCY AND PATENCY OF ACCESSORY CANALS IN FURCATION AREAS OF PRIMARY MOLARS
Lee, Seung-Hyun ; Kim, Sung-Ki ; Jeong, Tae-Sung ; Kim, Shin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 482~490
Deep caries in primary molars without early intervention frequently induce a pulpal disease and consequent abscess lesion in surrounding tissue. Especially in many furcation radiolucent lesions of primary molars, accessory canals in furcation areas of primary molars play an important role in theses pathological progress. Although the studies of these communication canals in furcation area of human permanent molar well documented, there has been little research showing their existence in primary molar. For the purpose of understanding the morphological characteristics of accessory canals at furcation areas of primary molars and examining its frequency and patency, 52 specimen teeth were observed under the scanning electro-microscope and tested with dye penetration under vacuum pressure, and obtained the results as follows : 1. In SEM study, the frequency of accessory foramina viewed from the external and internal furcation area was 60% and 35% respectively. Likewise the diameter of the accessory canals was within the range of
respectively. 2. The frequency of patent accessory canals evidenced by the dye penetrated under the vacuum suction at furca areas in primary molars was 50% among the 20 specimen teeth tested.
SEARCHING FOR THE PROPER SEATING METHOD OF SEAMLESS BANDS WITH UNIFORMLY COATED CEMENT
Kim, Hyung-Jun ; Jeong, Tae-Sung ; Kim, Shin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 491~497
Orthodontic seamless bands are frequently used in pediatric dentistry. In the process of seating bands with luting cement coated inside, not uniformed coating might bring about various problems such as enamel decalcification and/or gingivitis, and this clinical trial was made to review several band-seating methods to exclude these risks. One kind of band luting cement and one size of seamless bands were used on the resin replicas of an extracted maxillary and mandibular 1st molar with three different seating methods 1. seating the band with the luting cement coated only inside the band, 2. seating the band with the luting cement coated inside the band and on axial surfaces of the teeth, 3. seating the band with the adhesive tape on the occlusal opening of the band and the luting cement coated only inside the band. After cement was completely set, bands were peeled off from the teeth and the status of cement coating was evaluated. With this experiment more uniformed coating of the luting cement was found in latter two groups. These methods are thought more appropriate to almost completely rule out the risk of unevenly coated cement beneath the bands by conventional method.
LONG-TERM EVALUATING OF THE REMINERALIZATION OF INTERPROXIMAL CARIES ADJACENT TO GLASS IONOMER RESTORATIONS: A MICRO-CT STUDY
Lee, Hyeok-Sang ; Kim, Young-Jae ; Kim, Jung-Wook ; Jang, Ki-Taeg ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 498~503
This in vitro study compared the remineralization of incipient interproximal caries in the presence of three glass ionomer cements (highly-filled glass ionomer cement, compomer, resin-modified glass ionomer cement) and a resin composite(control). The long-term changes in remineralization caused by each material were evaluated by microtomography. Proximal restoration was simulated by placing tooth specimens and the various glass ionomer cements in closed containers with artificial saliva at
and pH 7.0 for 30 days with constant circulation Tomographic images were obtained with a micro CT scanner at 90, 180, and 270 days, and density-measuring software was used to calculate the micro-density of artificial caries lesions in the specimens. The mean density changes were compared between groups in order to evaluate the effects of remineralization. All data were analyzed using one-way ANOVA and the post-HOC Tukey multiple comparison test at p<0.05. While the density of artificial caries lesions increased for all treatments, the increases for the three glass ionomer groups were significantly higher than that for the resin group in each three month period. As time went on, the amount of density increase of the glass ionomer groups decreased, and significant differences were found between the remineralization effects of the glass ionomer groups.
THE PRACTICE PATTERN OF PEDIATRIC DENTISTS IN KOREA
Choi, Eun-Jung ; Jung, Tae-Ryun ; Hahn, Se-Hyun ; Kim, Young-Jae ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 504~509
Pediatric dentistry is differentiated from other fields of dentistry in that it provides comprehensive dental care for children and adolescents. In early days, pediatric dentistry used to be confined to the caries treatment and extraction of primary teeth However, the practice spectrum of pediatric dentistry has broadened to the orthodontic, surgical, esthetic and preventive treatments A survey that contained questions about practice patterns were mailed to 50 pediatric dentists, and 21 surveys were returned. Results were as follows: 1. The average number of patients per week was 82.4, and the average number of treated teeth per patient was 2.35. 2. Preventive treatments comprised 15.7%, restorative treatments 55.7%, endodontic treatments 15.6%, surgical treatments 10.5%, and orthodontic treatments 2.4%. 3. In restorative treatments, amalgam restoration comprised 3.8%, glass ionomer 5.5%, composite resin 63.0%, and stainless steel crown 27.7%.
DENTAL CROWDING AND ITS RELATIONSHIP TO TOOTH SIZE AND ARCH DIMENSION IN KOREAN
Lee, Nan-Young ; Hong, Sung-Su ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 510~521
This investigation was undertaken to examine the extent to which tooth size and arch dimension each contribute to dental crowding. The sample included 50 subjects with well aligned dentition (25 males, 25 females) and those of 40 subjects with gross dental crowding(20 males, 20 females). Plaster model and digital model made from alginate impression taken at the one visit. Tooth size, arch length, arch perimeter, intercanine width and intermolar width was measured on the plaster and digital models. The findings in this study lead to the following conclusions. 1. In maxilla, the mesiodistal diameters of lateral incisor and premolars of the crowded group were significantly larger than those of the normal occlusion group (P<0.05). 2. In mandible, the mesiodistal diameters of central incisor, canine and premolars of crowded group were significantly larger than those of the normal occlusion group (P<0.05). 3. In maxilla, arch perimeter and intermolar width of crowded group were significantly smaller than normal occlusion group but intercanine width of crowded group were larger than normal occlusion group (P<0.05). There was no significantly difference in arch length (P>0.05). 4. In mandible, arch perimeter of crowded group was smaller than normal occlusion group(P<0.05). There were no difference in arch length intermolar width and intercanine width (P>0.05) 5. In the analysis of correlation coefficients of arch length discrepancy with variables, arch perimeter, intermolar width and mesiodistal width of 2nd premolar showed positive correlations in maxilla. 6. There was a significant difference between tooth width measurements made by the 2 methods, with all the digital model measurement larger than plaster model measurements (P<0.05) : the magnitude of the differences does not appear to be clinically relevant. 7. In the analysis for reproducibility, the plaster model measurement was showed lower degree of correlation between 1st and 2nd measurement than digital model.
PROGNOSIS OF THE SURGICALLY REPOSITIONED MAXILLARY CENTRAL INCISOR IN INTRUSIVE INJURY
Min, Sung-Jin ; Ryu, Jung-Ah ; Kim, Seong-Oh ; Lee, Jae-Ho ; Choi, Byung-Jai ; Son, Heung-Kyu ; Choi, Hyung-Jun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 522~528
When tooth is displaced within the alveolar bone, it could apply pressure and rupture the apical vessels. Pulpal reaction in such case is affected by the stage of root formation, amount of intrusion and pulpal infection. Determining the need of pulp treatment depends on the pulp vitality. Therefore, periodic vitality tests, coronal color changes and radiographic root resorption signs should be observed through periodic post-trauma follow-up. Pulp necrosis, pulp canal obliteration, external root resorption, root ankylosis and marginal bone loss could result from periodontal injuries. Negative sign changes from positive signs of vitality tests suggest pulp necrosis. In this case, pulp treatment should be held before root resorption occurs. By comparing the following two cases, complications of intrusion and factors producing them could be confirmed, thus we propose to report these two cases.
CASE REPORT: SUPERNUMERARY TEETH ON MAXILLARY PREMOLAR AND MANDIBULAR INCISAL AREA
Oh, Min-Hyung ; Kim, Dae-Eup ; Ra, Ji-Young ; Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 529~533
Supernumerary teeth are defined as an excess in the number of teeth when compared to the normal dental formula. They are more prevalent in the permanent dentition than the primary dentition. Supernumerary teeth can occur in the maxilla, mandible, or both. But the majority are found in the maxilla and most of it is found in the premaxilla region The present cases documents about the uncommon cases of supernumarary teeth on maxillarty premolar area and mandibular incisal area.
DIAGNOSIS AND TREATMENT OF IMPACTED MAXILLARY CANINE
Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 534~547
Ectopic eruption and impaction of canines is a frequently encountered clinical problems. The incidence of impaction ranges between 1-3%. The cause of canine impaction can be the result of localized factors or can be a polygenic multifactorial inheritance and associated with other dental anomalies. The general dentist and pediatric dentist should know how to properly diagnose and manage potential disturbances in the eruption of maxillary canine. Diagnosis of impacted canine at age 8-10 years can significantly reduce serious ramifications, including surgical exposure and orthodontic traction as well as root resorption of the lateral incisors. Extraction of primary canine would be one of the method to prevent the impaction. The surgical procedure should be designed to minimize the destruction of periodontal tissue of impacted canine. Closed eruption technique is thought to be optimal method of surgical exposure compared with other methods. An overview of the incidence, sequela as well as the surgical periodontal, and orthodontic consideration in the management of impacted canine was presented.
Caries risk assessment and caries activity test
Lee, Jae-Cheoun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 3, 2006, Pages 548~557